وَمُنْقَطِعٌ: وَهُوَ الْمَذْكُورُ بَعْدَ «إِلَّا» وَأَخَوَاتِهَا، غَيْرُ مُخْرَجٍ عَنْ مُتَعَدِّدٍ؛ لِعَدَمِ دُخُولِهِ فِي الْمُسْتَثْنَى مِنْهُ، نَحْوُ: «جَاءَنِي الْقَوْمُ إِلَّا حِمَارًا».
Translation: A disconnected exception follows illā but is not removed from the group because it was never part of that group; for example: The people came to me, but not a donkey.
In «جَاءَنِي الْقَوْمُ إِلَّا حِمَارًا», a donkey is not one of the people. The exception is therefore disconnected.
The sentence still uses illā, but the excluded term is outside the category of the group.